Rivet setting machine



April 9 1935- v E. B. sTlMPsoN ET AL 1,997,438Y

RIVET SETTING MACHINE Filed FebVZO, 1933 l2' Sheets-Sheet- April 9,1935.

E, E. STIMPSQN ET AL RIVET SETTING MACHINE Filed Feb. 20,1933 5Sheets-Sheena INVENTORS April -9, 1935. E. B. sTlMPsoN :TAL 1,997,438

RIVET SETTING MACHINE Filed Feb. 2o, 1933 s sheets-Sheena lle ATTORNEYSY Patented Apr. 9,

Y l UNITED' STATES leerlas mar ss'rrmo naomi: i Edwin n. suin'psnn maJulius dunnere, rmklyn, N. Y., assignors pany. Brooklyn. York to l. B.Stlmpson OomlN. Y., a corporation of New Application February zo, 19:3,seria No. ssr,4az.

" The present invention relates to'improvemenrts ln rivet settingmachines and more especially in rivet setting machines of the treadleoperated Thepresent improvements relate to simplification and 4to powermechanisms of a treadle operated rivet setting machine wherein it isparticularly desirable to conserve the energy of the operator and4 toapply 'the same most elciently to produce the rivet setting operation.Machines `of this type are usually operated by operators of limitedmechanical knowledge and skill, and, therefore, it is desirable thatsuch machines shall be as. simple inconstruction as is commensurate withstrength and durability which the usage -of these machines require. Itis particularly desirable that machines of this type be of such designas to facilitate economies in manufacture because inthe majority ofcases, the machines are leased without fee to .rivet users by rivetmanufacturers whose compensation is received through the sale of rivets.Therefore, machines which are expensive to manufactureresult in a verylarge-outlay of capital by the,rivet manufacturer, ad any economy whichmay be produced by novel designs is of extreme importance in this typeoff device. 4

Devices of this character must be provided with``feedan'dinthepresientcasea primary element in the feedl construction isa rivet feeding cup. l' It has been the practice of the art heretofore`ib utilize cusmanufacturedby machining -an iron casting. These cupschangedfrom time to time'by the user when different.sized rivetsare usedand the cups areI ofter dropped the operator during such changes. Castiron cups break'when dropped on hard floors, and the machine operationsin producing the cast iron cup is an expensive proceeding. Furthermore,cast iron cups are heavy and since the cup is started and vstopped 'byeach treadle operation, a subi;

of the heavy-cup at each operation. i 'i The present inventioncomprises'ma cup having-j.

wn metal cup portionilnserted within ama-'- chined metal rim andprovided with a staked tubular hb. In the manufacture ofthis novel cup,the cup portion is formed of thin sheet metal be embodied in'structuresother than those'spedrawnto Vshsfpe. The hub is cut from a small wroughtmeta'ltube; and the lrim is a section from a large wrought metal tube inwhich are machined the rivetfreeding slots and a Ashouiaer to receivethe rimof the pressed metal;cup.` The parts aregthen assembled bypressing operations and the result is a cup of malleable metal'ofw.weight less than one-half the weight necessary to providea cast cup ofthe same strength. l Furtherl more, since the metals of the assembledcups are i malleable, they are not easily broken by dropping or beingsubjected to rough usage, and the cups are very economical tomanufacture.

Another feature of the present invention is the I Another feature oflthe present, invention'is a" 'simplified ratchet construction comprising'dupli-` cate pressed metal members' which when asseml" bled form alight weight ratchet 'wheel of adequate strength to operate the feedcup, -Another feature of the present invention is the rivet holding cupjawswhich comprise'a single stripof spring material provided with cox nplementary rivet cups to hold a rivet in pos'ition to be set.

Another feature lates to the feeding head 'franie and hopper which ofthepresent invention re- -I are formed of a single piece-of light weightsheet metal. thereby combining sturdiness with econ- .ony of weight `andvalso providing a structure which may be very economically manufactured.A further object of the present-.ihventionis the construction ofan openfeed hopper located adjacent the feed cup whereby a substantial part of`the tgp of the rim of the feed cup at the top ,f t'hereof isunobstructed by guides so that Vany rivets `whiclrmay be carriedupwardly by the 'feed cup are rel for subsequent feeding operations.

The above generally descri mechanisms: toether' with otherdeatures wi bemore specifito fallback 'into the cup l cally described in the detailspecification herein-y after following.

n is realizedtnatftne present inventions may emcauyjdisciosed herewith,and, therefore. -it 'is to be understood that the. disclosure isto beoonsideredaslillustrativeand notin -the limiting I shorten i of themachine shown in Fig. 1.

' spring member. is formed.

Fig. 3 is a detail front elevational view of the feed hopper frame.

Fig. 4 is a side elevational view of the hopper frame. l

Fig. 5v isa front elevational View of the feed cup. v

Fig.A 6 `is a side elevational view of the feed cup showing a portionthereof in section.

Fig. 'I is a sectional view through the' rim of the'feed cup shown inFig. 6.

Fig. 8 is a plan view of one of the ratchet members.

Fig. 9 is an elevational view of the ratchet member lshown in Fig. 8.

Fis. v10 is anelevational view of two members of the character shown inFigs. 8 and 9 assembled face to face to comprise a complete ratchetwheel.

Fig. 11 is a side-viewof the rivet spring cup.

Fig. 12 is a front view of the rivet spring cu'p.

Fig. 13 illustrates a blank from which the rivet feed - Infisni for therivetsetting punch.

'Referring now more especially to Figs. 1 and 2, `a hollow pedestalframe I isprovided with a base 2 in which a treadle l is secured Abyapivot shaft 5.- A coil spring 6 is anchored to one endof the pedestalframe and atthe other end of the treadle B to normally lmlcd the treadleupward against an adjustable rew stop 1 mounted on the front of thepedestal frame `I to provide an adjustable Ilimit stop for the upperposition of the treadla A similar screw stop l is mounted beneath thetreadle in the base frame I. A head frame s Vis bolted to the pedestalframe 'I andcarries the feed mechanism` and' .the rivet setting devices.A'f main link i0 connects the treadle 4 with a main toggle lever H whichispivoted on a short shaft I2 in the head frame l. A main toggle link Ilthrough apivot shaft Il, connects the main toggle lever H with asecondary toggle lever I! mounted on the operating shaft IO. for therivet-V feed. A secondary toggle' link vIl connects the secondary togglelever Il with the plungerwhich carries the rivet settinghead.Byreferring to Fig. 14,` it will be observed. that when the treadleoperates topull the main link Alil downward to its limit of movement,that the' pivot of the main toggle lever 1|, the connection between thistoggle lever` Il and the main toggle link Il, all assume a straight lineandat the same time the pivot of the secondary toggle lever, thesecondary toggle link i1 and the axis of the plunger il also assume astraight line. 'I'he operation of the main toggle and the secondarytoggle produce a very powerful pressing action relative to the lowerlimit of stroke of the plunger il. The operation of the toggles and theplunger is practically a free movement until the rivet setting operationbeginsv at which time' the main toggle and the secondary toggle areapproaching a straight line conclusion of movement, at which timetheoperator'sforce on the -treadle is very eective to vapply greatpressure to the' rivet setting mechanism The head frame I is providedwith a strongextension anvil arm Il carrying an anvil l0' which ismounted lfor vertical adJustn'xent` by means ofthe lock -nut adjustmentlscrew Il.

Lacasse The sheet metal feed frame is provided with a' circular recess2li and with a flange 2t which is adapted to be positioned adjacenttheperiphery ,of the rim 21 of the feed cup 28 which is mounted on theoperatingshaft I6 with the hub 20 of the feedcup 2l frictionally pressedAagainst .the bottom oi'.` the recessed portion 2l of the feed hopper'frame by a spring spider SII which -is seated beneath the removable wingnut 3|. This construction facilitates removal of the feed cup 2l when itis desired to change cups for differ- `comprising small washers throughwhich securing rivets l1 extend. Sheet metal arm guides Il and Il aresecured to the curved arm ll by means of similar securing rivets 11 andspacers Il. The lower end the curved senil-circular guide Il isvlangularly inclined at 4U andthe upper ndV of the varm guide ,89 iscorrespondinsly inc Il to provide a junction portion between thesemi-circular space 42 between the rim 21 of the cup 2l and thesemi-circular guide Il. This space extends into the inclined space orrivet track Il which leads to the spacel 45 forming the vertical trackbetween the guides II and 3i. llhe lower'end'of the vertical track Il'is bridlied by the rivet holder spring cup Il (see Figs. 1, 2. d11.,12, and 13). This spring'up is formed from aV blank of spring materiallprovided with a pair of spring arms l1 and 4l which are connected by abridge I! that leads to .extensions il and 6I. riveted through thecurved arm Il of the feed frame 22 in such manner that the spring-'cupmembers!! and M are in the path of the rivet setting head l! which iscarriedon the plunger I8.

'Ihese extensions 50 and Il are preferably It 1s desirable that rivetsshall be fed one at a time to the rivet cup 4l and to this end, a feedann Il is mounted about'half way up on the curvedarm I4 of the feedframe. This feed arm 'A guide Il, a suitable spacing washer and intothe' boss Il. The upper end of the feed frame is held in'position byextending over the main shaft II and beingforced against the top of thehead frame by the spring spider 3B which holds the feed cupin position.

Referrlng'now back to the feed arm l0, the

frontend of this feed arm is provided. with a flnger I0 that normallyextends into the vertical track Il for the rivets. 'I'he other side ofthe feedV arm is provided with a curved surface il. the center of whichcomprises the axis of the stub screw Il. 'A rivety pocket I! is.provided between the finger Il and the curved surface 6|. The

power end of the feed arm In is connected by a bent offset link I4secured tothe connectionlbatween the main toggle link and the secondary'tossle lever so that when the tossle operateatlle pocket62 is of suchsize and shape as to-accomvmodate the stem of a single rivet. When thecut-olf or feed arm 56 is oscillated, the finger 6I moves downwardly andythe curved stop surface 62 swings across the vertical track 45 tointercept the 4verticalvmovement of the rivets in the feed track 45above the single rivet which has been resting on the finger 60.Continued movement of the *cut-off `arm removes theflnger 60 from thepath 45 and permits the selected single rivet to fall downwardly `in thelower portion of the track 45 and to drop off of the track into thespaced apart spring cup members 52 and 54 with the head of the rivetsupported in the cups and the stem of the rivet extending downwardly ina vertical direction between the spring arms 41 and 48 of the spring cuphol'der 56 so that when the rivet setting head 55 descends, it willdescend directly over the rivet and cam the spring arms 41 and 48outwardly,thus releasing the rivet and carrying the same downwardlyagainst the setting anvil 20.'

In the operation of the device, it is desirable that the feed cup 28shall be given an inter-v mittent rotating movement. This isaccomplished by va ratchet pawl 65 mounted on the pivot shaft I3connecting the mainv toggle link I4 with the secondary toggle lever I5.This pawl engages ratchet teeth 66 onthe ratchet wheel 61 which (Figs.8, 9, and is formed of two stampings of sheet metal. These stampings areidentical and comprise a blank having turned in teeth members 66 whichpreferably are of an uneven number so that when two of these blanks areset face to face, the ends of the teeth 66 on one blank comes oppositesolid metal on the other blank. Thesev blanks are also provided withoutturned rims 68 to form a hanged guide for the pawl 65. The ratchetwheel blanks are also provided with a shaft opening 69 which fits overthe main shaft I 6 so that when the ratchet wheel is operated, the,shaft IIS is turned.

It will be observed that the space adjacent the feed hopper 24 on therim 21 of the feed cup 28- is an open space not associated with rivetguides.Y

This open space facilitates the automatic gravity removal of any rivetswhich may "be carried 'outwardly during the .operation of the feed cup28.

'The rivet setting device herewith disclosed is economicallymanufactured, efficient in the use' of manual power to set rivets and issturdy in construction.' The construction of the operating parts,particularly the rivet feed cup is such that light weight metal may be'used, and, therefore, the operator wastesV little power in overcominginertia of heavy'moving pai-ts. Furthermore, the entire feed mechanismis of such light weight sturdy construction that the removal ,of `thestub screw 51, the mounting screw 59 and the wing nut 3l releases theentire rivet feeding device from the machine so that it may easily bereplacedrby one of a dierent size for handling different types and kindsof rivets.

What we claim, is: y

l. A device of the character described comprising a frame, a main shaftcarried by said frame, a rivet feeding cup mounted'on said main shaft, afriction clutch operatively connecting said cup with said main shaft, aratchet wheel mounted on said main shaft, a manually operc able memberfor operating said device, an anvil,

a plunger cooperating with said anvil to set rivets, a plunger operatinglever pivoted on said main shaft, a' pivot shaft connecting said leverwith linkage mechanism leading to said manually operable member, and aratchet pawl mounted on said pivot shaft and adapted to engage theVteeth of said ratchet wheel whereby said main shaft is rotated whensaid plunger is operated.

2. A device of the class described comprising a frame, a manuallyoperable member adapted to` apply manual forces to operate said device,an anvil, a .plunger adapted to cooperate with said anvil to set rivets,a main'shaft carried by saidl frame, a rivet feeding cup mounted on saidmain shaft, friction means operatively connecting said cup with saidmain shaftaa plunger operating lever mountedy on said main shaft, linkmechanism operatively `connecting said manuallly operable member withsaid lever, and means connected to said lever to intermittently rotatesaid main shaft in the rotative direction of movement of said lever when.said lever is operated to cause said plunger to set a rivet againstsaid anvil..

3. A device of the class described comprising in combination a frame, ananvil, a plunger carried by said frame and adapted to cooperate withsaid anvil to set rivets, means to apply forces to operate said device,a main shaft, a rivet feeding cup carried by saidmain shaft, and meansto intermittently rotate said cup, said rivet feeding cup comprising anotched rivet feeding rim, a sheet metal cup member secured to said rim,and a tubular hub staked to said sheet metal cup.

' 4. In a rivet setting device, the combination of a frame; rivetsetting means carriedby said frame; rivet feeding devices comprising asheet metal back frame having a hopper portion inte-y gral with saidback frame and a substantially vertical rivet chute base integral withsaid back frame, whereby a single integral piece of sheet metalcomprises'said hopper, said back frame, and a rivet chute base; a feedcup adapted to cooperate with said back frame; and rivet guides carriedby said back frame to guide rivets. from said feeding mechanism to therivet settingy y6. A rivet setting device comprising in combinationmechanism for setting rivets, devices to feed rivets .to said settingmechanism comprising a plunger, and a spring cup adjacent said settingmechanism to hold individual rivets in the path n said plunger, and abridge integral with said y spring arms to provide apassageway for rivetstems.

7. A rivet setting device comprisingvan anvil,

`a rivet setting plunger, feed mechanism ineluding a substantiallyvertical feed chute, va pivoted rivet selector cooperating with saidfeed chute to feedrivets one at a time beyond said selector, saidselector comprising a nger extending across the feed chute, a rivetpocket adjacent said finger and i for with a passageway leading fromsaid bridge an utotfportion-,a'djacent' said rivetl -hoider ompr'isingan integral -member provided 'with springarms terminating in a pair ofopposed half eup.lme'mberswith said spring arms acting to normallyforce-said-.pairl of half cup members together, and a bridge memberintegral with said arms and comprisingthe support theremember andbetween the -mtom portions of said cup members. v

9. A feed 'cup 'for selectively feeding articles, said feed cup'comprising' a sheet metal cup mem-l ber, a feed rim provided on theface thereof with feed notches through which articles to be selected arefed, a shoulder provided on said rim,`the edge of said sheet metal cupcooperating` with said shoulder on said rim whereby said cup comprises fthe sole support for said rim, and a tubular hub staked to the back ofsaid sheet metal cup where.-v by said hub comprises the soie support forsaid cup, the axis of said hub and said cup being substantiallycoincident.

. EDWINB. STIMPSON.

^ JULIIUS GUALTIERE.

